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Estimating Multivariate CARMA Processes and Continuous Time State Space Models

Robert Stelzer
(Ulm University)
Thieleseminar
Torsdag, 12 april, 2012, at 13:15-14:00, in Koll. D (1531-211)
Abstrakt:
Multivariate Lévy-driven continuous time autoregressive moving average processes are the continuous time analogues of the well-known ARMA processes. Formally, they are defined as stationary solutions to (possibly high order) linear differential equations driven by a Lévy process. In this talk we will first discuss in detail the proper definition and the equivalence to general order continuous-time state space models. Then we will summarise important probabilistic properties which are related to the statistical inference.

Finally, we will establish that under natural assumptions a quasi-maximum likelihood approach can be used to estimate the autoregressive and moving average parameters of a multivariate CARMA process based on discrete time equidistant observations. We will illustrate the estimation scheme by a simulation study and a data example.
Organiseret af: The T.N. Thiele Centre
Kontaktperson: Søren Asmussen